Stratospheric aerosol injection (SAI) aims to introduce aerosols (or their precursors) into the stratosphere to reflect solar radiation and cool the Earth. Its feasibility and impacts depend on processes spanning scales from plume microphysics to global climate. We invite contributions that advance process-level understanding of SAI through numerical (or data-driven) modeling, laboratory experiments, and ambient observations.

We welcome studies: (1) modeling aerosol processes from near-field plume to global scales, including Lagrangian/plume/contrail modeling, large-eddy simulations, computational fluid dynamics, improved parameterizations (e.g., turbulence, solid aerosols), high-resolution GCMs/downscaling; (2) Laboratory experiments on sulfate and alternative aerosols under stratospheric conditions, including heterogeneous chemistry, microphysics, radiative properties, and ice nucleation; (3) Observational constraints from background stratosphere and natural analogs, like volcanic eruptions, pyroCb events, monsoon convection.

We also welcome studies elucidating mechanisms governing SAI’s climatic impacts, including interactions with clouds (mixed-phase or cirrus), atmospheric circulation and climate, as well as associated uncertainties, feedbacks, and sensitivities.

• GC - Global Environmental Change
• H - Hydrology
• NH - Natural Hazards
• PP - Paleoceanography and Paleoclimatology